I’m not aware of any use being made (at least in Ohio) of the tables that were discontinued before the 2012-16 CTPP.  For travel modeling, as Ohio has a wide variety of urban area sizes, the CTPP data used varies between the smaller and larger regions.  Beyond PUMS and heavy reliance on the 1-dimensional SF1 and SF3 tables, the CTPP use is focused where we want to have 2 or 3-dimensional tables at the zone or small district level of geography, the larger urban areas make use of the journey-to-work info and income level by mode of travel and number of workers (tables B103203, B112202 & A302103).  As transit usage is not significant in the small regions that I work with, the CTPP table use there is focused on what can be joined down to zone level to the NCHRP 716 “transferable parameters” trip generation tables (e.g. household size X number of workers – table A112211) and what can improve accuracy for peak hour/dynamic assignment modeling (such as the time of arrival pattern by zone at place of work - table A202112).  Finally, as we rely on QCEW and private vendors for employment data, we don’t generally use Part 2 tables much, but due to the QCEW/BLS focus on wage and salary workers, we do intend to also make use of the new tables in Part 2 highlighting class of worker, but exactly how still TBD.

Going forward, it’s not the lack of tables that we worry about as much as the level of accuracy and usability of the information – due to both the increasing unwillingness of the populace to provide complete and accurate answers to the Census combined with increasingly stringent levels of disclosure/confidentiality review.

Hello and happy new year CTPP!

 

It’s the email you’ve all been waiting for! The CTPP 2012 to 2016 dataset was released in 2019 and you all have been working with it since.  We are specifying the next special tabulation of census data. It will be based on the 2017 to 2021 ACS and now is your chance to tell us what you need.  As you know, the 2012 to 2016 data was very pared down from the previous tab, we now have the opportunity to review if we lost critical tables and want to add them back, or if your analytical needs have changed to the point where you need new cross tabs to complete your varied mandates.

 

If you would like to suggest a table be added back or created anew, please

·        reply to me directly pweinberger@aashto.org or jzang@camsys.com with your feedback, or

·        reply directly to the list to stimulate discussion, or

·         if you prefer anonymity, you can answer your questions here: https://tinyurl.com/CTPPFeedback

 

To download a current list of tables go to https://ctpp.transportation.org/2012-2016-5-year-ctpp/

And click: The specific data tabulations and available geographies can be found HERE.

 

Penelope Weinberger

CTPP Program Manager

AASHTO

Ctpp.transportation.org

 

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